Tools & Gear Taps & Dies Chrome Alloy Taps

• 1/2 x 12 BSW Chrome Alloy Die Nut
• British Standard Whitworth (BSW).
• Die nuts are commonly used when a button die is not suited due to work space restrictions and / or on site thread accessibility.
• They can be used as thread chasers to clean an existing thread.
• They can also be used to create a new male thread on non-ferrous metals and plastics.
• Chrome alloy dies are not suitable for creating precision, safety or critical threads.
• The BSW thread form was developed by Sir Joseph Whitworth in 1841.
• The thread form has rounded roots and crests and is specified in BS84:1956.
• The thread angle for BSW is 55° as opposed to 60° in Metric and Unified threads.